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IRS alignment

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Hello:I can not get the IRS to align. During start up it will only align one of the IRS receivers. I start cold and dark, have the immediate alignment set and use the normal procedures check list to get the plane ready to go. But as stated only one aligns and the other two just sit on 1 minute to go to align. Any ideas.Regards,Ronald Neil

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All 3 IRS Switches from 'OFF' to 'NAV'...then enter PPOS via the FMS POS INIT Page. The IRS Switches are not saved as part of any previously saved or created panel state scenarios...so...prior to IRS Alignment if they are in any postion other than 'OFF' place them to 'OFF' before 'NAV' to start the process correctly. Don't get fixated with the 'ALIGN' position...that is a slightly different mode.

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